General Description

The MAX1474 is a fine-line (geometry) electronically trimmable capacitor (FLECAP) programmable through a

simple digital interface. There are 32 programmable capacitance values ranging from 6.4pF to 13.3pF in 0.22pF increments (Table 1). The quartz dielectric capacitance is highly stable and exhibits a very low voltage coefficient. It has virtually no dielectric absorption and has a very low temperature drift coefficient (<33ppm/°C). The MAX1474 is programmed through two digital interface pins, which have Schmidt triggers and pulldown resistors to secure capacitance programming.

Features

♦Tiny SC70 Package (1.1mm x 2.2mm x 2.4mm)

♦High-Performance Electronically Trimmable Capacitance

♦Very Simple Digital Interface

♦Eliminates the Need for Mechanical Tuning

♦Enabling Technology for Low-Cost Production Line Automation

♦Fully Static Operation After Programming (No Switching)

Applications

Post-Trim of Low-Cost Regenerative Receivers

Tunable RF Stages

Low-Cost, Low-Temperature Drift Oscillators

Garage Door Openers

Keyless Entry

Industrial Wireless Control

Capacitive Sensor Trimming

RFID Tags